XRReferenceSpace.cpp (1953B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this file, 5 * You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #include "mozilla/dom/XRReferenceSpace.h" 8 9 #include "VRDisplayClient.h" 10 #include "mozilla/dom/XRRigidTransform.h" 11 12 namespace mozilla::dom { 13 14 XRReferenceSpace::XRReferenceSpace(nsIGlobalObject* aParent, 15 XRSession* aSession, 16 XRNativeOrigin* aNativeOrigin, 17 XRReferenceSpaceType aType) 18 : XRSpace(aParent, aSession, aNativeOrigin), mType(aType) {} 19 20 already_AddRefed<XRReferenceSpace> XRReferenceSpace::GetOffsetReferenceSpace( 21 const XRRigidTransform& aOriginOffset) { 22 RefPtr<XRReferenceSpace> offsetReferenceSpace = 23 new XRReferenceSpace(GetParentObject(), mSession, mNativeOrigin, mType); 24 25 // https://immersive-web.github.io/webxr/#multiply-transforms 26 // An XRRigidTransform is essentially a rotation followed by a translation 27 gfx::QuaternionDouble otherOrientation = aOriginOffset.RawOrientation(); 28 // The resulting rotation is the two combined 29 offsetReferenceSpace->mOriginOffsetOrientation = 30 mOriginOffsetOrientation * otherOrientation; 31 // We first apply the rotation of aOriginOffset to 32 // mOriginOffsetPosition offset, then translate by the offset of 33 // aOriginOffset 34 offsetReferenceSpace->mOriginOffsetPosition = 35 otherOrientation.RotatePoint(mOriginOffsetPosition) + 36 aOriginOffset.RawPosition(); 37 38 return offsetReferenceSpace.forget(); 39 } 40 41 JSObject* XRReferenceSpace::WrapObject(JSContext* aCx, 42 JS::Handle<JSObject*> aGivenProto) { 43 return XRReferenceSpace_Binding::Wrap(aCx, this, aGivenProto); 44 } 45 46 } // namespace mozilla::dom